The magnetic field of IRAS 16293-2422 as traced by shock-induced H2O masers
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2012

H2O masers are important magnetic field tracers in very high density gas. We show one of the first magnetic field determinations at such high density in a low-mass protostar: IRAS 16293-2422. We used the Very Large Array (VLA) to carry out spectro-polarimetric observations of the 22 GHz Zeeman emission of H2O masers. A blend of at least three maser features can be inferred from our data. They are excited in zones of compressed gas produced by shocks between the outflows ejected by this source and the ambient gas. The post-shock particle density is in the range 1 - 3 × 109 cmt−3, and the line-of-sight component of the magnetic field is estimated as ~ 113 mG. The outflow dynamics is likely magnetically dominated.

masers

ISM: individual: IRAS 16293-2422

polarization

ISM: magnetic fields

stars: formation

Författare

F. O. Alves

Universität Bonn

Wouter Vlemmings

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

J. M. Girart

Universitat Autonoma de Barcelona (UAB)

J. M. Torrelles

Universitat de Barcelona

Proceedings of the International Astronomical Union

1743-9213 (ISSN) 1743-9221 (eISSN)

Vol. 8 74 - 78

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper

DOI

10.1017/S1743921312006679

ISBN

9781107032842